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Marathon 225STFC1858-AU

Series: 225

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The Marathon 225STFC1858-AU is a three-phase induction motor from the Marathon range. The rated output is 18.5 kW. The motor is eight-pole, which at 50 Hz gives a synchronous speed of 750 rpm. The rated voltage is 415 V. The housing is frame size 225 S in foot-mounted form. The protection class is IP55. The efficiency is 90.2 per cent at full load, 91.5 per cent at 75 per cent load and 90.6 per cent at half load. Mounting arrangements to IEC 60034-7: B3, B5, B35, V1, B14 and B34. The motor is built in China. The data is based on the Australian MEPS registration under standard AS/NZS 1359.5:2004; measured to AS/NZS 1359.102.3:2000. Rated output across the Marathon range ranges from 0.75 to 160 kW; the 225STFC1858-AU sits at the bottom of that range with 18.5 kW. Its immediate neighbours are the XGA180L6 below it with 15 kW and the 180LTFC0224-AU above it with 22 kW. 499 Marathon models across 3 series are on record.

Marathon – 225 series at a glance

The 225 series from Marathon comprises 12 models in the register, in the Electric motors group. Rated power ranges from 18 to 45 kW. Listed in the register: 225MTFC0228-AU, 225MTFC0228E3, 225MTFC0306-AU, 225MTFC0306E3.

Sources: SpecCodex-Register (eigene Daten)

Technical data

Engine

Rated output18.5 kWcorrect

Electrical data

Rated voltage415 Vcorrect
Number of poles8correct
Protection classIP55correct
Frame size225 S (foot)correct
Mounting (IEC 60034-7)B3, B5, B35, V1, B14, B34correct
Efficiency at full load90.2 %correct
Efficiency at 75 % load91.5 %correct
Efficiency at half load90.6 %correct

Origin and approval

Country of manufactureChinacorrect

Other data

Standard appliedAS/NZS 1359.5:2004correct
Test methodAS/NZS 1359.102.3:2000correct

Frequently asked questions

How much power does the Marathon 225STFC1858-AU have?

The Marathon 225STFC1858-AU delivers 18.5 kW.

What to check before buying

  • Match the data plate against the order: frame size, mounting and rating have to agree.
  • Check the ingress rating against the installation site — outdoors or in dust the demands differ.
  • Hold the mounting form and dimensions against the existing seat before ordering.
  • The pole count sets the speed — when replacing an older unit, compare this first.
  • For used units, ask about winding condition and bearing play.
  • Ask about parts availability for this series — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 22 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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Other models in this series

225MTFC0228-AU

225MTFC0228E3

225MTFC0306-AU

225MTFC0306E3

225MTFC0452-AU

225MTFC0452E3

225MTFC0454-AU

225MTFC0454E3

225STFC0374-AU

225STFC0374E3

225STFC1858E3

Sources: Energy Rating — Australian government equipment register (retrieved August 2026) · How we check the data

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